Deployment

Deploying a SvelteKit App using Paraglide-Sveltekit is usually no different than deploying a normal SvelteKit App.

However, there are some considerations you may want to take with certain hosting providers.

Serverless Providers

Paraglide-SvelteKit makes use of AsyncLocalStorage to keep track of the language on the server without introducing cross-talk between concurrent requests.

Serverless providers usually spawn an instance of the server for each request, so this isn't necessary. To improve performance you can disable it.

// src/hooks.server.js
import { i18n } from "$lib/i18n"

export const handle = i18n.handle({
	disableAsyncLocalStorage: true, // @default = false
})

Deployment on Cloudflare

Paraglide-SvelteKit makes use of AsyncLocalStorage. AsyncLocalStorage is supported on Cloudflare, but you need to enable the nodejs_als feature flag in wrangler.toml.

compatibility_flags = [ "nodejs_als" ]

Issues on Vercel

SvelteKit's reroute hook currently doens't play well with Vercel (see sveltejs/kit#11879), which means that we need to slightly adapt the setup to make it work when deployed to Vercel.

1. Remove the reroute hook from src/hooks.js
2. Move the routes you want to localize routes into a [[locale]] folder
3. Don't use translated pathnames

We are working on contributing a fix for sveltejs/kit#11879, so this workaround will hopefully not be needed much longer.